title: Palladium-catalyzed annulation of o-iodobiphenyls with o-bromobenzyl alcohols: synthesis of functionalized triphenylenes via C-C and C-H bond cleavages.
abstract: Treatment of o-iodobiphenyls with o-bromobenzyl alcohols in the presence of cesium carbonate under palladium catalysis affords a series of highly substituted triphenylenes. The reaction involves two C-C bond formations and C-C and C-H bond cleavages. A combination of palladium and an electron-deficient phosphine ligand proves to be effective for both decarbonylative cross-coupling and intramolecular cyclization.
authors.affiliation: Division of Earth, Life, and Molecular Sciences, Graduate School of Natural Science and Technology , 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan, and Japan Science and Technology Agency , ACT-C, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Iwasaki
authors.forename: Shohei
authors.initials: S
authors.lastname: Iino
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Nishihara